<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->

    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
        class="tree-table"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
          ></i>
          <i class="el-icon-error" v-else style="color: red"></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            type="success"
            size="mini"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag type="warning" size="mini" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt" slot-scope="scope">
          <el-button
            type="primary"
            icon="el-icon-search"
            size="mini"
            @click="editCateFormInfo(scope.row.cat_id)"
            >编辑</el-button
          >
          <el-button
            type="danger"
            icon="el-icon-delete"
            size="mini"
            @click="deleteCate(scope.row.cat_id)"
            >删除</el-button
          >
        </template>
      </tree-table>
      <!-- 分页区 -->
      <el-pagination
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>
    <!-- 添加分类 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <!-- 添加分类的表单 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <!-- 级联选择框 -->
        <el-form-item label="父级分类">
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChanged"
            clearable
            change-on-select
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="editCateDialogVisible"
      width="50%"
      @close="editCateDialogClosed"
    >
      <!-- 编辑分类的表单 -->
      <el-form
        :model="editCateForm"
        :rules="editCateFormRules"
        ref="editCateFormRef"
        label-width="100px"
      >
        <el-form-item label="编辑名称" prop="cat_name">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      cateList: [],
      // 查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      //   总条数
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name',
        },
        {
          label: '是否有效',
          type: 'template',
          // 当前使用这一列使用模板名称
          template: 'isok',
        },
        {
          label: '排序',
          type: 'template',
          // 当前使用这一列使用模板名称
          template: 'order',
        },
        {
          label: '操作',
          type: 'template',
          // 当前使用这一列使用模板名称
          template: 'opt',
        },
      ],
      addCateDialogVisible: false,
      //   添加分类的表单数据对象
      addCateForm: {
        // 将要添加的分类名称
        cat_name: '',
        // 父级分类id
        cat_pid: 0,
        // 分类等级，默认添加一级分类
        cat_level: 0,
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' },
        ],
      },
      // 父级分类的列表
      parentCateList: [],
      // 指定级联选择器 的配置对象
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
      },
      selectedKeys: [],

      editCateDialogVisible: false,
      editCateForm: {
        cat_name: '',
        cat_id: 0,
      },
      editCateFormRules: {},
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo,
      })
      if (res.meta.status !== 200)
        return this.$message.error('获取商品分类失败')
      //   把数据列表赋值给 cateList
      this.cateList = res.data.result

      this.total = res.data.total
    },
    // 当前页码改变
    handleCurrentChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    // pagenum改变
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    // 点击按钮添加展示分类的对话框
    showAddCateDialog() {
      this.getParentCateLsit()
      this.addCateDialogVisible = true
    },
    // 获取父级分类的数据列表
    async getParentCateLsit() {
      const { data: res } = await this.$http.get('categories', {
        params: {
          type: 2,
        },
      })
      if (res.meta.status !== 200) return this.message.error('父级数据获取失败')
      this.parentCateList = res.data
    },
    // 选择项发生变化触发
    parentCateChanged() {
      if (this.selectedKeys.length > 0) {
        // 父级分类的id
        this.addCateForm.cat_pid =
          this.selectedKeys[this.selectedKeys.length - 1]
        //  当前分类等级
        this.addCateForm.cat_level = this.selectedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    // 点击分类添加新的分类
    async addCate() {
      this.$refs.addCateFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          'categories',
          this.addCateForm
        )
        if (res.meta.status !== 201) return this.$message.error('添加分类失败')
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    // 监听对话框的关闭事件，重置表单
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    },
    // 编辑按钮
    editCateFormInfo(id) {
      this.editCateForm.cat_id = id
      this.editCateDialogVisible = true
    },
    //编辑确定按钮
    async editCate() {
      const { data: res } = await this.$http.put(
        'categories/' + this.editCateForm.cat_id,
        {
          cat_name: this.editCateForm.cat_name,
        }
      )
      if (res.meta.status !== 200) return this.$message.error('更新失败')
      this.$message.success('更新成功')
      this.getCateList()
      this.editCateDialogVisible = false
    },
    // 清空对话框
    editCateDialogClosed() {
      this.$refs.editCateFormRef.resetFields()
    },
    async deleteCate(id) {
      const confirm =await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch(e=>e)
      if(confirm==='confirm'){
      const { data: res } = await this.$http.delete(
        'categories/' + id
      )
      if (res.meta.status !== 200) return this.$message.error('删除失败')
      this.$message.success('删除成功')
      this.getCateList()
      }else{
        this.$message.info('取消删除')
      }

    
    },
  },
}
</script>

<style>
.tree-table {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
}
.el-cascader-menu {
  height: 300px;
}
</style>